Gallery was hampered by injures throughout his time with the Oakland Raiders and Seattle Seahawks. He missed 18 games over the past three seasons and 24 games over his career.

Gallery had surgery to repair a torn groin muscle last season.

Gallery was the No. 2 overall draft pick by the Raiders in 2004. He was drafted as a tackle but moved to guard in 2007. He played seven seasons with the Raiders before signing with the Seahawks for the 2011 season.